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Finding the Fourth Proportional to 680,558.98, 939,225.63 and 394,084.12

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Solution

The fourth proportional to 680,558.98, 939,225.63 and 394,084.12 is: 543,867.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,558.98 : 939,225.63 = 394,084.12 : x
  2. Step 2: Convert to fraction form
    680,558.98/939,225.63 = 394,084.12/x
  3. Step 3: Cross multiply
    680,558.98x = 939,225.63 × 394,084.12
  4. Step 4: Simplify right side
    680,558.98x = 370,133,905,880.00
  5. Step 5: Solve for x
    x = 370,133,905,880.00/680,558.98
  6. Step 6: Final answer
    x = 543,867.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.